According to the T2D Knowledge Portal (https://t2d.hugeamp.org/), summarizing the T2DM GWA studies [25], although at a relatively low level, a significant association was found between increased HbA1c levels and ABCG2-Q141K polymorphisms, while no significant correlation was observed between fasting blood glucose levels and this polymorphism (see details in S3 Fig, S1 Table). This evidence concerns the gene ABCG2 and type 2 diabetes mellitus.